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@eine grieten stmt @fitta GE() RGE J, WARDWELL, OF RUTLAND, V RMNT.

i Letters Patent IVO. 69,283, dated September 24, 1867;

IMPROVED MACHINE FOR QUARRYING STONE.

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TO ALL WHOM IT MAY CONCERN:

Beit known that I, GEORGE J. WARDWELL, ot' Rutland, in the county of Rutland, and State of Vermont, have invented certain new and luseful improvements in Machinery for Quarrying Stone; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a 'part of this specification, in which- Figure 1, sheet 1, is an elevation of the right-hand side of the improved machine.

Figure 2 is an elevation of the left-hand side of the machine.

Figure 3, sheet 2, is a top View of tlicniachine.

Figure 4 is a section through the machine, taken in the horizontal plane indicated by the line x x in iig. l,

Figure 5, sheet 3, is a. front elevation of the machine.

, Figure G is a transverse section, taken through the machine in the vertical plane indicated 'by line y y in fig. 3. I

Figure 7 is an enlarged view in detail, showing the manner of connecting the chisel-stocks to the vibrating levers. i

Figures 8 and 9 show the manner of applying the cliiseis or bits to solid or sectional chisel-stocks.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to certain novel improvements on the stone-cutting machinery which isdescribed in iny Letters Patent numbered respectively 40,58%, 51,271, and 51,272, and also in my reissues numbered 2,087 and 2,088, and designed for cutting vertical or iiiclincd.chaiiiiels or kerfs in the beds of quarries preparatory to cutting under and separating the blocks of stone.

The object of the first part of this invention is to arrange the toothed rails upon which the carriage of a stone-cliaiinelling machine travels forward and backward upon the outeiivertical `sides of the sleepcrs,`and to brace the sleepers so as to` prevent their lateral displacement, as will be hereinafter described.

'K n n 1 l n Another object of my invention is to so construct a. stone-eliannelliiig machine having a single frame fori carrying the several parts, for driving, cutting, and feeding, that the engine-shaft shall communicate motiorn'te the chisel-stocks, and also to the feeding mechanism, as will be hereinafter explained.

Another object of my invention is to employ a reversible pawl upon a vibrating fccdearin, for admitting of the reversal of the carriage at pleasure without reversing the engine or its crank-shaft, as will be hereinafter described. I

Another object of my invention is to employ a frictionbrake upon the feed-shaft, for preventing the carriage from moving further forward or backward than lit will be carried by the alternate feeding-strokes of the pawl aiiii, as will be hereinafter described.

Another object of my invention is to employ solid chisel-carrying stocks, stepped upon those `ends which receive the chisels or bits, for the purpose of obtaining stocks possessing greater strength than the sectionstocks hitherto employed, as will be hereinafter described.

lAnother object of my invention is to communicate rectilinear reciprocating movements to the chiselcarrying stocks, by means of vibrating segment levcrs,which are connected to the stocks at the centres of their width, as will be hereinafter described.

Another object of my invention is to so construct the standard-guides, between which the chisel-stocks move, that these guides can be reversed, end for end, so as to cause them to wear equally, as will benhereinaft-er described.

Another objcctof my invention is to employ removable cutting-points or ehisels upon the stepped ends of the chisel-stocks, whether suoli stocks be made solid or in detachable sections, for the purpose of admitting of the removal of the cliisels, one or all, for sharpening or repairing, without removing the stocks from their guides.

Another object of my invention is to arrange the feeding spur-wheels upon the outside of the carriage, in rear of the chisel-stocks, in conjunction with toothed rails, which are arranged upon the Vouter vertical surfaces ot' the sleepers, for the purpose of preventing the track upon which the machine travels from spreading, as will be hereinafter set forth.

'lo enable others skilled in the art to understand my invention, I will describe its construction and operation.

In the accompanying drawings, A A represent the parallel sleepers of the track upon which the machine which I am about to describe is caused to move backward and forward. These sleepers are firmly connected together by cross-tics A1, which also serve as braces for preserving the parallelism of the sleepers and prcventing lateral displacement thereof. On the outside of the. sleepers A A rails a a are firmly secured, so that their upper surfaces project above the surfaces of the sleepers and serve as guides for' the machine during its reciprocating movements. The outer vertical surfaces of the said rails have spur-tceth formed on them, as shown at al, with which. two pinion spur-wheels, a2 ai, engage. The track thus constructed is firmly secured upon the quarry bed, at the point desired to cnt or channel the same, and the lcngthof the track will be regulated by the length of the channels which it is desired to cut. The pinion spur-wheels alia are keyed cn the lower` ends of vertical shafts b b, which are arranged on the outside of the frame or carriage B, as shown in fig. 6, and which have their bearings in journal-boxes bl bl, projecting from the sides ofthe frame B, and also in cap-plates Bl Bl, which are bolted firmly upon this frame.' Upon the upper ends of the vertical shafts I) bevel spur-wheels bill)2 are keyed,which engage with and are driven by bevel pinion spur-wheels b3 b3, that are keyed on a horizontal transverse shaft, C. This shaft C has its end bearings in the cap-plates Bl Bl, and carries the vibrating feed-arm, the feed-spur, and brake, as will be -hereinafter described. The frame or carriage Bis constructed of plates of iron firmly bolted together, and bracedso as to afford the required strength and rigidity to sustain the several parts employed in the work of channelling stone. This frame should be made sufficiently strong to admit of its being moved about bodily without straining or dcranging the mechanism upon it. Upon both sides of the frame or carriage B, ollsets Il? B2 are applied, which form housings for the spurwhcels above described, and also supports for the standards of the chisel-stocks, as will be hereinafter described. The rear part of the frame or carriage B is sustained upon 4the rails a a by means of flanged shoes orA slides al (z2-which embrace said rails and prevent lateral displacement of the carriage at this point. The front end of the carringe is sustained upon the rails a a by means of flanged wheels a" a, which prevent lateral displacement at this point. In front of thefeed-shaft C is the engine-shaft E, through which motion is communicated to thc channelling devices 'and the feed mechanism. This shaft E extends transversely across the top of frame or carringe B, and is supported upon pillow-blocks c c, which are firmly bolted upon the longitudinal sides of frame or carriage B, and also upon *the offsets B2 thereof.. To the crank of shaft E a Pitman-rod, d, is attached, the rear end of which is pivoted to the piston-rod (Z of the engine F. 'lhc slide-valve of this engine receives its movements from the shaft E, through the medium of an eccentric, di, and pitman-rod, di. The pump d, which is on top of the steam-cylinder of the engine, is operated by a rod connecting with the cross-head of thc pistou-rod dl, as shown in figs. 2 and 3. The engine may be constructed in the manner represented in the drawings, or in any other suitable manner. The steam-boiler is constructed somewhat like that of a locomotive or portable steam engine. Thel lire-box G is firmly secured centrally botwecn'the longitudinal sides of the carriage B, and the forward end of the cylindrical boiler Grl is sustained by striding-braces G2, which are rigidly bolted to the said carriage, as shown in the drawings, sheets 1 and 3. l Near the ends of the main driving-shaft E,

camsvor toesff are keyed upon it in such manner as to operate alternately upon the shortest arms of segment H, and. thus give a vibrating motion to them. 'lhese levers vibrate vin vertical planes, and have their fulcra in the pillow-blocks c1 e; their longest arms are connected by means of lifting and pulling-down ropes or chains el el to the chisel-carrying blades I I, so as to reciprocate these blades vertically in their standardguides .I J. The front ends or segment faces of said levers H are grooved, so as to receive and keep in place the ropes or chains c cl, one of which latter is carried upward and attached to an eye, c2, upon the chisel-stock, and the other is carried downward and attached to the lower clamp of the chisel-stock. The ropes or chains should be attached to their respective stocks I, at such points as will cause the levers II toA lift and pull down these stocks without any tendency to tilt them or cause them to bind in their guides; therefore I locate the said points of attachment in thc middle ofthe width ofthe stocks. The eyes c" are removable, and they can be attached nearer to or further from the upper ends of their respectivo stocks, as circumstances may require, a number of'holes being made through the stocks for this purpose. The clamps D, to which the lifting-ropes are attached, arealso movable, so astobe capable ofattachmcnt at differents points to their stocks. The chisel-carrying stocks I I may be made solid, as shown in iigs. 2 and 9, or they may be made of longitudinal sections, clamped together in any suitable manner. 'lhesc stocks are guided and kept in place in their vertical reciprocating movements by means of the standard-guides .I Jl, which have'shouldered tenons formed on their inner parallel faces, that lit into corresponding grooves formed-in the clamps D l), which are applied to the stocks I, as shown in lig. 3, AThe standard-guides J, which are on the inner sides of the cl1iselst`0cks, are secured rigidly nt their lower ends to oscillating-boxes K2, which are sustained by forward and rear trunnions bearing upon the frame or carriage outsidcfof the rail-track. The upper ends of said guides J have horizontal yokes K3 secured to them, as shown in the drawings. The outer standard-guides .Il are secured to the outer side plates of the boxes K2, which plates are hinged, as shown in the drawings, so as to allow the said standards to be swung lopen, as'

shown in fig. 2, for removing the'chiscl-carrying stocks. 'Ihe upper parts of the standard-guides Jl are hinged to the yokes K3 by means of horizontal bars K". The standard-guides are all constructed so as to be reversible, that is to say, they can bc turned end for end by dctaching them Afrom 'their oscillating-boxes and the yokes K3, for the purpose of preventing unequal wear of the clamps upon the guiding-tenons. The standard-'guides are held firmly in the desired position by means of transverse braces K6 K, which are connected by ljoints to the ribs on the inner standards Jl, and by means of' nuts to a plate, K, upon the boiler (il. By turning the nuts o n the ends of the rods the standard-guides maybe adjusted and set at any required angle with respect to the frame or carriage to which they are applied, so that should the carriage incline thc chisel-stocks can be set to work in vertical planes. The stand-.rrdguidcs are also braced by inclined rods L L, which are secured to the inner standards, and which extend backward and are secured to the carriage-frame, as shown in figs. 1

and 2. The feed-shaft C has a toothed whcehg, keyed to it, into the teeth of which a reversible pawl or dog, ll. engages. This pawl is pivoted to an arm, g, which is applied so as to vibrate loosely upon the shaft C,and which receives its vibrations from an eccentric, N, upon the crank-shaft E, through the medium of a connectingrod, Nl, as shown in figs. l and 3. The eccentric N is constructed in such manner and so secured to the balancewheelP that it can be adjusted for shortening or lengthening the strokes of the levenarin r/l, so as to increase or diminish the forward or backward movements of the machine upon its track. Oa the inside of the vibrating arm gl, and keyed on the feed-shaft C, is a brake-wheel, M, having an annular groove formed in its periphery. lThis brake-wheel acted upon by a weight, S, upon one end of a spring-brake, Sl, which is secured at' its other end to the frame or carriage B, in front of thc shaft C, as shown in figs. l and 3. The weight S is adjustable upon the brake-arm for increasing or diminishing the friction or resistance olfered to the rotation of shaft C at pleasure. The pawl L is p'ivoted to the vibrating feed-arm in such manner that it can be reversed 'at pleasure, so as to cause the frame or carriage to move forward or backward without reversing or stopping the engine or its shaft E. In practice, the rearends or short arms of the segment-levers lli H will have blocks of India rubber beneath them, which are designed to overcome the inertia of said levers when their forward ends are thrown up to their highest points, und by a quick elastic reaction upon the chisehstocks suddenly force them down, thereby producing more effective blows upon the stone. The lower ends ofthe chisel-stocks are stepped, as shown in figs. S and l), and these stepped ends are bored out so as to form sockets for receiving the shanks of removable chiscls t t, which are secured in place by transverse keys, erin any other suitable manner. By thus employing removable chisels, frequently removing the stocks I from the standard-guides will be avoided.

In the operation of the machine which I have abovr` described, the balance-wheel I upon the crank-shaft E will equalize the movements of the feeding and channelling mechanism, and also the engine, without in any manner interfering with thc arrangement of the cutters in close proximity to the walls of the quarry. Such wheel being arranged between the longitudinal sides of the carriage will also operate with less strain upon its shaftthan would be the case if 'it were applied outside of the carriage, upon one cxtreme end of this shaft.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The toothed rails (t al and the spur-wheels al, arranged outside of the carriage B, in combination with devices which control the feed and operate the chisels, substantially as described and shown.

2. The combination ofthe chisel-carrying stocks I, feed-shaft C, and engincshaft E, substantially in the manner and for thc purpose described.

3. The combination of thc reversible pawl i, vibrating arm gl, feed-wheel g, friction-brake, chisel-carrying stocks I, racks a al and pinions a?, substantially in the manner and for the purpose described.

4. '.lhe adjustable weight S, applied to thc brakeu'od Sl, in combination with the feeding mechanism, and with the chisel-carrying stocks, substantially as and for the purpose described.

5. The chisel-carrying stocks, either sectional or solid, stepped on their lower ends, and constructed so as to receive removable chisels, substantially as described and shown.

(i. The friction-brake, applied to a stone-channellingmachine in the manner substantially as described.

T. Communicating a rectilinear reciprocating motion to a chisel-stock of a stone-chanuelling machine by y means of vibrating segmental levers II, cams ff,`and flexible connections el c, substantially as described.

S. The combination of reversible standard-guides .I .Il with yoke K3, hinged oar Ii", and the oscillating-box KZ, substantially as described.

9.' The arrangement o-f the balance-wheel P upon the crank-shaft E on the inside of the carriage B, substantially as described.

I0. The arrangement of the engine-shaft E and feed-shaft C upon the carriage B, at intermediate points between thc fire-box Gl and the standard-guides J Jl, substantially as described.

GEORGE J. WARDWELL.-

Witnesses:

Guo. E. Rover-1, C. CLARK. 

